Re: Need help in eliminating "bleed-through"

Robert Hershoff (mailto:hershoff@bird.library.arizona.edu)
Thu, 15 Jan 1998 12:22:05 -0700 

Message-Id: <199801151916.MAA19490@dns.ccit.arizona.edu>
Date:         Thu, 15 Jan 1998 12:22:05 -0700
From: Robert Hershoff <mailto:hershoff@bird.library.arizona.edu>
Subject:      Re: Need help in eliminating "bleed-through"
To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU


January 15, 1998


The combination of a dark backing paper (previously mentioned by
Peter Nelson) and some judicious adjustment of the scanner controls
for brightness and contrast should make it possible to minimize the
show-through.


Please let us know how this works out.


Regards,


Robert


*****************************************************
Robert Hershoff / The University of Arizona Library
Main Library Room A304 / 1510 E. University Boulevard
P.O. Box 210055 / Tucson, AZ 85721-0055
voice (520) 626-7415 / fax (520) 621-9733
e-mail: mailto:hershoff@bird.library.arizona.edu
*****************************************************


On Thu, 15 Jan 1998, Patricia Bruce wrote:


> Try placing a dark piece of paper behind the scanned object.  Black is

> recommended, but you may need to try other dark colors, depending upon the

> color of the ink.

> "Peter Nelson" <mailto:pnelson@MTHOLYOKE.EDU> Wrote:

> |

> | Please excuse cross-posting.

> |

> | We are using a flatbed scanner and Photoshop 4.0 to create

> | JPEG images of

> | handwritten manuscripts, and recently encountered a series

> | of documents

> | written in dark ink on very thin onionskin paper.

> | Consequently there is a

> | bad "bleed-through" problem, i.e. writing on the verso can

> | plainly be

> | seen.  This results in nearly illegible text.  Does anyone

> | on this list

> | know of any trick, such as a mask or filter, that can

> | reduce or eliminate

> | this problem?  I should add that the original mss. present

> | the same

> | problem, so any solution would in effect be improving on

> | the visual

> | quality of the originals.

> |

> | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

> | +-+-+-+-+-+

> | Peter Nelson

> | mailto:pnelson@mtholyoke.edu

> | Five College Archives Digital Access Project

> | c/o Mount Holyoke College Archives

> | http://clio.fivecolleges.edu

> | South Hadley, MA 01075

> | (413) 538-3020

> |        Don't anthropomorphize computers.  They don't like

> | it.

> | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-

> | +-+-+-+-+-+

> |

>